In almost every place where we find totems we also find a law against persons of the same totem having sexual relations with one another and consequently against their marrying. This, then, is 'exogamy', an institution related to totemism.

If youth knew; if age could.

Whoever loves becomes humble. Those who love have, so to speak, pawned a part of their narcissism.

Only the real, rare, true scientific minds can endure doubt, which is attached to all our knowledge.

Only a rebuke that 'has something in it' will sting, will have the power to stir our feelings, not the other sort, as we know.

Intolerance of groups is often, strangely enough, exhibited more strongly against small differences than against fundamental ones.

Concerning the factors of silence, solitude and darkness, we can only say that they are actually elements in the production of the infantile anxiety from which the majority of human beings have never become quite free.